Abstract

Metamaterial absorbers (MAs) have drawn increasing attention due to their prospects in many fields such as sensing, thermal emission, solar energy harvesting, etc. However, it remains challenging to realize broadband MAs with a simple structure. Here, we propose a broadband, polarization-insensitive, and omnidirectional MA working in the near-infrared range with simple structure, which is composed of titanium dioxide (TiO2) cylinder nano-antenna arrays on the top of a vanadium (V) film deposited on a silicon substrate. This device demonstrates broadband absorption spectra from 820 to 1440 nm with the absorption above 90%, with high absorption up to the incident angle of 50°. The broadband absorption of the designed MA is mainly attributed to the interaction both of dielectric cavity resonance and electric dipole resonance. The electric and magnetic field intensity distribution of the MA are analyzed to better understand its absorption mechanism. In addition, the effects of the geometrical parameters on absorption are discussed. The demonstrated MA is relatively easy to fabricate and can be realized with other proper materials to work in other wavelength bands. The design is useful for applications such as solar energy harvesting, sensing, and camouflage.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Ultra-broadband absorber from visible to near-infrared using plasmonic metamaterial

Lei Lei, Shun Li, Haixuan Huang, Keyu Tao, and Ping Xu
Opt. Express 26(5) 5686-5693 (2018)

Investigation of a broadband refractory metal metamaterial absorber at terahertz frequencies

Dan Hu, Hongyan Wang, Zhenjie Tang, and Xiwei Zhang
Appl. Opt. 55(19) 5257-5262 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription